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Method for manufacturing display device, and transparent resin filler




Title: Method for manufacturing display device, and transparent resin filler.
Abstract: The present invention prevents air bubbles from being mixed in at the time of resin filling. In a supplying step (FIGS. 5D, 5E), a transparent resin filler is dispensed and supplied from supply means so that the transparent resin filler comes into contact with both of an image display panel and a front panel to draw a predetermined pattern, and the transparent resin filler is maintained in contact with both of the panels until drawing of the predetermined pattern is completed. ...


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USPTO Applicaton #: #20120263964
Inventors: Tomoyuki Toyoda, Yoshihisa Shinya, Yasumi Endo


The Patent Description & Claims data below is from USPTO Patent Application 20120263964, Method for manufacturing display device, and transparent resin filler.

TECHNICAL FIELD

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The present invention relates to a method for manufacturing a display device in which a transparent resin filler is filled between an image display panel and a front panel, and to the transparent resin filler.

The present application asserts priority rights based on JP Patent Application 2009-236520 filed in Japan on Oct. 13, 2009. The total contents of disclosure of the Patent Application of the senior filing date are to be incorporated by reference into the present application.

BACKGROUND

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ART

In related art, there has been proposed a display device in which a transparent resin filler is filled between an image display panel and a front panel. As the transparent resin filler, optical elastic resin having refractive-index matching property is used to improve viewability and impact resistance of a display device (For example, refer to Patent Literatures 1 and 2.).

As a resin filling method, there has been conventionally used a inversion method in which a resin is applied to either an image display panel or a front panel and made to hang down without opposing its own weight, then the image display panel and the front panel are bonded together so as to prevent air bubbles from being mixed in.

However, a larger display device inevitably needs more resin to be applied, and it is difficult to maintain a shape of the applied resin, therefore, when the resin applied side is inverted, resin drips at many points to form closed spaces, whereby air bubbles remain.

A tilting method in which resin is filled by tilting either an image display panel or a front panel can secure the uniformity of a resin amount at the time of application, however, it is difficult to secure the uniformity of a final resin thickness due to pushing out of resin. In addition, the panels are bonded together with bringing a lower side panel which resin is applied closer to an upper side panel, therefore air bubbles could remain.

As a filling method to solve these problems, there has been proposed a Gap-Dispense method to arrange an image display panel and a display panel in parallel with securing a predetermined Gap amount and fill the Gap with resin.

However, in the Gap-Dispense method, when resin is supplied, air bubbles are mixed in a transparent resin filler before drawing of a predetermined pattern is completed, thereby air bubbles sometimes remain in a display device.

RELATED TECHNICAL DOCUMENTS Patent Documents

Patent Document 1: PCT International Publication No. WO2008/007800 Patent Document 2: PCT International Publication No. WO2008/126893

SUMMARY

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OF THE INVENTION Problem to be Solved by the Invention

In view of the above problems, the present invention has been made, the present invention provides a method for manufacturing a display device, the method being capable of preventing residual air bubbles, and a transparent resin filler.

Means to Solve the Problem

In order to solve the above-mentioned problems, a method for manufacturing a display device according to an embodiment of the present invention is a method for manufacturing a display device in which a transparent resin filler is filled between an image display panel and a front panel, and comprises an arranging and inserting step of arranging the image display panel and the front panel with a predetermined gap, and inserting supply means between the image display panel and the front panel, the supply means configured to dispense and supply the transparent resin filler;

a supplying step of supplying the transparent resin filler from the supply means; a filling step of pressing the image display panel or the front panel to fill a gap between both of the panels with the transparent resin filler; and a filled layer forming step of forming a layer filled with transparent resin by curing the transparent resin filler, wherein, in the supplying step, by dispensing and supplying the transparent resin filler from the supply means so that the transparent resin filler comes into contact with both of the image display panel and the front panel, a predetermined pattern is drawn, and the transparent resin filler is maintained in contact with both of the panels until drawing of the predetermined pattern is completed.

The transparent resin filler according to an embodiment of the present invention is a transparent resin filler which is filled between the image display panel and the front panel of the display device, and has a viscosity of 800 to 3500 mPa·s.

Advantageous Effects of Invention

According to an embodiment of the present invention, at the time of supplying resin, the transparent resin filler is kept in contact with both of the panels until drawing of a predetermined pattern is completed, therefore, even in a large display device, as well as a small display device, air bubbles can be prevented from remaining in the transparent resin filler.

BRIEF DESCRIPTION OF DRAWINGS

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FIG. 1 is a side view showing a filling device.

FIG. 2 is a plan view showing the filling device.

FIG. 3A is a plan view showing a tip of a dispensing nozzle, and FIG. 3B is a side view showing the tip of the dispensing nozzle.

FIG. 4 is a sectional view showing the dispensing nozzle which is dispensing a filling liquid.

FIG. 5A is a sectional view showing a step in which a liquid crystal panel is stuck by suction to a liquid crystal panel holding stage while a protective panel is stuck by suction to a protective panel holding stage. FIG. 5B is a sectional view showing a step of inserting the dispensing nozzle into a gap between the liquid crystal panel and the protective panel. FIG. 5C is a sectional view showing a step of bringing the liquid crystal panel holding stage and the protective panel holding stage closer, and holding the liquid crystal panel and the protective panel with a predetermined gap. FIG. 5D is a sectional view showing a step of dispensing an adhesive from the dispensing nozzle. FIG. 5E is a sectional view showing a step of drawing a predetermined drawing pattern by dispensing an adhesive from the dispensing nozzle. FIG. 5F is a sectional view showing a step of removing the dispensing nozzle from the gap between the liquid crystal panel and the protective panel. FIG. 5G is a sectional view showing a step of pressing the liquid crystal panel and the protective panel to spread out the adhesive.

FIG. 6A is a plan view showing a step in which the liquid crystal panel is stuck by suction to the liquid crystal panel holding stage while the protective panel is stuck by suction to the protective panel holding stage.

FIG. 6B is a plan view showing a step of inserting the dispensing nozzle into the gap between the liquid crystal panel and the protective panel.




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stats Patent Info
Application #
US 20120263964 A1
Publish Date
10/18/2012
Document #
File Date
12/31/1969
USPTO Class
Other USPTO Classes
International Class
/
Drawings
0




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20121018|20120263964|manufacturing display device, and transparent resin filler|The present invention prevents air bubbles from being mixed in at the time of resin filling. In a supplying step (FIGS. 5D, 5E), a transparent resin filler is dispensed and supplied from supply means so that the transparent resin filler comes into contact with both of an image display panel |Sony-Chemical-&-Information-Device-Corporation
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